Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen

BPERFORMING OPERATIONS TRANSPORTING B30Presses B30BPRESSES IN GENERAL

B30B1/00Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen

B30B1/001by explosive charges B30B1/002by internal combustion mechanism B30B1/003by an elastic bag or diaphragm expanded by fluid pressure B30B1/005by thermal expansion or evaporation B30B1/006by a scissor or lazy-tongs mechanism B30B1/007using a fluid connection between the drive means and the press ram B30B1/008by a rod swinging between a fixed plane and the ram B30B1/02by lever mechanism B30B1/04operated by hand or foot B30B1/06operated by cams, eccentrics, or cranks B30B1/08operated by fluid-pressure means B30B1/10by toggle mechanism B30B1/103operated by screw means B30B1/106operated by another toggle mechanism B30B1/12operated by hand or foot B30B1/14operated by cams, eccentrics, or cranks B30B1/16operated by fluid-pressure means B30B1/18by screw means B30B1/181the screw being directly driven by an electric motor B30B1/183Braking mechanisms for the return movement of the press ram B30B1/185driven through friction roller means B30B1/186Control arrangements B30B1/188driven by a continuously rotatable flywheel with a coupling arranged between the flywheel and the screw B30B1/20driven by hand B30B1/22driven through friction disc means B30B1/23operated by fluid-pressure means B30B1/24by rack-and-pinion means B30B1/26by cams, eccentrics, or cranks B30B1/261by cams B30B1/263work stroke adjustment means B30B1/265using a fluid connecting unit between drive shaft and press ram B30B1/266Drive systems for the cam, eccentric or crank axis B30B1/268using a toggle connection between driveshaft and press ram B30B1/28the cam, crank, or eccentric being disposed below the lower platen or table and operating to pull down the upper platen or slide B30B1/30by the pull of chains or ropes B30B1/32by plungers under fluid pressure B30B1/323using low pressure long stroke opening and closing means, and high pressure short stroke cylinder means B30B1/326operated by hand or foot B30B1/34involving a plurality of plungers acting on the platen B30B1/36having telescoping plungers B30B1/38wherein the plungers are operated by pressure of a gas B30B1/40by wedge means B30B1/42by magnetic means